"""
AI 绘画生成视图
"""
from rest_framework import status
from rest_framework.decorators import api_view, permission_classes
from rest_framework.permissions import IsAuthenticated
from rest_framework.response import Response
from django.utils import timezone
import hashlib
import time


@api_view(['POST'])
@permission_classes([IsAuthenticated])
def generate_painting(request):
    """
    AI 绘画生成接口
    POST /creation/painting/generate
    """
    # 获取请求参数
    styles = request.data.get('styles', [])
    description = request.data.get('description', '')
    keywords = request.data.get('keywords', [])
    ratio = request.data.get('ratio', '1:1')
    resolution = request.data.get('resolution', '768x768')
    
    # 验证参数
    if not styles:
        return Response({
            'code': 400,
            'message': '请选择至少一个艺术风格',
            'data': None
        }, status=status.HTTP_400_BAD_REQUEST)
    
    if not description and not keywords:
        return Response({
            'code': 400,
            'message': '请提供创作描述或关键词',
            'data': None
        }, status=status.HTTP_400_BAD_REQUEST)
    
    try:
        # 目前使用占位图片服务
        # TODO: 后续集成真实的 AI 图像生成 API（Stability AI、DALL-E等）
        
        # 解析分辨率
        width, height = resolution.split('x')
        
        # 生成唯一的种子（基于用户ID、时间戳和描述）
        seed_string = f"{request.user.id}-{time.time()}-{description}-{'-'.join(keywords)}"
        seed = int(hashlib.md5(seed_string.encode()).hexdigest()[:8], 16) % 10000
        
        # 使用 Picsum Photos 作为占位图片
        image_url = f"https://picsum.photos/{width}/{height}?random={seed}"
        
        # 记录生成信息到控制台
        print(f"🎨 用户 {request.user.username} 生成图片:")
        print(f"   风格: {', '.join(styles)}")
        print(f"   描述: {description}")
        print(f"   关键词: {', '.join(keywords)}")
        print(f"   分辨率: {resolution}")
        print(f"   图片URL: {image_url}")
        
        # TODO: 保存到数据库
        # artwork = Artwork.objects.create(
        #     user=request.user,
        #     type='painting',
        #     title=description[:50] if description else '未命名作品',
        #     description=description,
        #     style=','.join(styles),
        #     content=image_url,
        #     parameters={
        #         'styles': styles,
        #         'keywords': keywords,
        #         'ratio': ratio,
        #         'resolution': resolution
        #     }
        # )
        
        return Response({
            'code': 200,
            'message': '生成成功',
            'data': {
                # 'artwork_id': artwork.id,
                'image_url': image_url,
                'created_at': timezone.now().isoformat()
            }
        })
        
    except Exception as e:
        print(f"❌ 生成失败: {str(e)}")
        return Response({
            'code': 500,
            'message': f'生成失败: {str(e)}',
            'data': None
        }, status=status.HTTP_500_INTERNAL_SERVER_ERROR)


@api_view(['POST'])
@permission_classes([IsAuthenticated])
def generate_music(request):
    """
    AI 音乐生成接口
    POST /creation/music/generate
    """
    # TODO: 实现音乐生成逻辑
    return Response({
        'code': 501,
        'message': 'AI 音乐生成功能开发中',
        'data': None
    }, status=status.HTTP_501_NOT_IMPLEMENTED)


@api_view(['POST'])
@permission_classes([IsAuthenticated])
def generate_writing(request):
    """
    AI 写作生成接口
    POST /creation/writing/generate
    """
    # TODO: 实现写作生成逻辑
    return Response({
        'code': 501,
        'message': 'AI 写作生成功能开发中',
        'data': None
    }, status=status.HTTP_501_NOT_IMPLEMENTED)
